Remove unused layout preset and state dropdown

Remove unusaged HAML code for Roadmap filtered
search which included layout presets and epic
state dropdown.

ee/app/views/shared/epic/_search_bar.html.haml

 - type = local_assigns.fetch(:type)
 - hide_sort_dropdown = local_assigns.fetch(:hide_sort_dropdown, false)
-- show_roadmap_presets = local_assigns.fetch(:show_roadmap_presets, false)
 - hide_extra_sort_options = local_assigns.fetch(:hide_extra_sort_options, false)
-- preset_layout = roadmap_layout
-- is_quarters = preset_layout == "QUARTERS"
-- is_months = preset_layout == "MONTHS"
-- is_weeks = preset_layout == "WEEKS"
 
-.epics-filters{ class: "#{'epics-roadmap-filters' if show_roadmap_presets}" }
+.epics-filters
   .epics-details-filters.filtered-search-block.d-flex.flex-column.flex-md-row.row-content-block.second-block
-    - if show_roadmap_presets
-      .btn-group.btn-group-toggle.gl-mr-3.js-btn-roadmap-presets{ data: { toggle: 'buttons' } }
-        %label.btn.gl-button.btn-secondary.btn-roadmap-preset{ class: ("active" if is_quarters) }
-          %input{ type: 'radio', name: 'presetType', autocomplete: 'off', checked: ("checked" if is_quarters), value: 'QUARTERS' }
-            = _('Quarters')
-        %label.btn.gl-button.btn-secondary.btn-roadmap-preset{ class: ("active" if is_months) }
-          %input{ type: 'radio', name: 'presetType', autocomplete: 'off', checked: ("checked" if is_months), value: 'MONTHS' }
-            = _('Months')
-        %label.btn.gl-button.btn-secondary.btn-roadmap-preset{ class: ("active" if is_weeks) }
-          %input{ type: 'radio', name: 'presetType', autocomplete: 'off', checked: ("checked" if is_weeks), value: 'WEEKS' }
-            = _('Weeks')
-      .filter-dropdown-container.gl-mr-3
-        = render 'shared/epic/state_dropdown'
     = form_tag page_filter_path, method: :get, class: 'flex-fill filter-form js-filter-form' do
       - if params[:search].present?
         = hidden_field_tag :search, params[:search]

ee/app/views/shared/epic/_state_dropdown.html.haml

-.dropdown.gl-new-dropdown.inline.dropdown-epics-state
-  %button.btn.gl-button.btn-default.dropdown-toggle{ type: 'button', data: { toggle: 'dropdown' } }
-    = epic_state_title(@epics_state)
-    = sprite_icon('chevron-down', css_class: 'gl-button-icon gl-icon dropdown-chevron' )
-  %ul.dropdown-menu.dropdown-menu-selectable
-    .gl-new-dropdown-inner
-      %li
-        = epic_state_dropdown_link('all', @epics_state)
-      .dropdown-divider
-      %li
-        = epic_state_dropdown_link('opened', @epics_state)
-      %li
-        = epic_state_dropdown_link('closed', @epics_state)